CN111776163A - Positioning method for half ship and block water gap butt joint - Google Patents
Positioning method for half ship and block water gap butt joint Download PDFInfo
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- CN111776163A CN111776163A CN202010412326.0A CN202010412326A CN111776163A CN 111776163 A CN111776163 A CN 111776163A CN 202010412326 A CN202010412326 A CN 202010412326A CN 111776163 A CN111776163 A CN 111776163A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
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Abstract
The invention discloses a positioning method for water space-above butt joint of a half ship and a block, which specifically comprises the following steps: determining the linear deviation delta L of the hull structure at the position of the mark point on the semi-ship; the half ship lifts and falls the mound to the second dock, calculate the position deviation angle a of the half ship according to the distance L from the mark point on the half ship to the second reference line on the side of the second dock and the linear deviation Delta L of the hull structure at the position of the mark point; positioning and heading the fuel tank block according to the landing deviation angle a of the half ship; and embedding the embedding subsection in an embedding area between the half ship and the fuel tank main section. The method is simple to operate and convenient to implement, the total section of the fuel tank floats and then is positioned in place at one time, the position of the fuel tank does not need to be adjusted and positioned at the second time, the time of using the three-dimensional jacking trolley to perform the secondary adjustment operation in the traditional method is reduced, the carrying period of a dock is shortened, and the production cost of an enterprise is saved.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a positioning method for half ship and block water space butt joint.
Background
In the process of building the LNG ship, except for the stern of the engine room, the LNG fuel tank is more difficult to carry, the construction period is longer, and in order to shorten the construction period, the two parts of structures are usually carried and folded in advance.
Usually, the stern half ship and the fuel tank block are built in different docks, after the building is finished, dock gates of the two docks are respectively opened, water is drained by opening a gate, the stern half ship floats in the dock where the fuel tank block is located, and then the dock gate is closed to start draining water. Because the half ship is heavy and has a deeper draft than the total section of the fuel tank, the half ship will fall into the pier first, and the fuel tank will fall into the pier only when the water is continuously drained. After water in the dock is drained, the build-up section and the stern half ship are carried, and the position of the fuel tank total section can be changed due to the influence of water buoyancy, so that the fuel tank total section needs to be secondarily positioned by adopting a three-dimensional jacking trolley after water is drained, and the fuel tank total section and the build-up section are carried. The construction method greatly prolongs the construction period, increases more capital investment and increases the production cost of enterprises.
Disclosure of Invention
In view of the above, the present invention provides a positioning method for the above-water spaced docking of a half ship and a block, so as to solve the above-mentioned problems in the background art.
A positioning method for half ship and block water gap butt joint specifically comprises the following steps:
s1, determining the linear deviation delta L of the hull structure at the position of the mark point on the half ship;
s2, floating and falling the pier to the second dock by the half ship, measuring the distance L between the mark point on the half ship and the second reference line on the side of the second dock, and calculating the falling position deviation angle a of the half ship according to the linear deviation delta L of the ship structure at the position of the mark point and the distance L between the mark point and the second reference line;
s3, positioning and heading the fuel tank total section according to the landing deviation angle a of the half ship, so that the fuel tank total section and the half ship are positioned on the same straight line and an embedding area with a certain straight line distance is kept between the fuel tank total section and the half ship;
and S4, embedding the embedding sections in the embedding area between the half ship and the fuel tank total section.
Preferably, the specific step of determining the linear deviation Δ L of the hull structure at the position of the mark point on the half ship in step S1 is as follows:
s11, marking a first reference line parallel to the center line of the half ship body of the first dock on the side margin of the first dock;
s12, selecting a plurality of mark points on the half ship along the length direction of the half ship;
s13, establishing a coordinate system by taking the first reference line as an X axis, and measuring and recording the distance from each mark point to the first reference line by using a total station;
and S14, respectively calculating the linear deviation Delta L of the ship structure at the position of each mark point according to the measured distance value between each mark point and the first reference line.
Preferably, the linear deviation Delta L of the hull structure at the position of the ith mark point on the half shipi＝li-l1Wherein l isiIs the distance from the ith marking point to the first reference line, l1And the distance from the 1 st mark point to the first reference line is the distance, wherein the 1 st mark point is a mark point close to the end part of the half ship.
Preferably, the step of calculating the landing deviation angle a of the half ship in step S2 is:
s21, correcting the distance value between the mark point on the half ship and a second reference line on the side edge of a second dock according to the linear deviation delta L of the ship structure at the position of the mark point;
and S22, performing linear regression analysis on the distance value between the corrected mark point and a second reference line on the side edge of the second dock to obtain the landing deviation angle a of the semi-ship from the semi-ship landing pier to the semi-ship in the second dock.
Preferably, the second reference line is parallel to a dock centerline of the second dock.
Preferably, the step S3 of positioning and landing the fuel tank block according to the landing deviation angle a of the half ship specifically includes:
firstly, selecting a plurality of measuring points in the total section of the fuel compartment along the length direction of the total section of the fuel compartment;
then, calculating the distance value from each measuring point to a second reference line according to the landing deviation angle a of the half ship and the length of an embedding area between the half ship and the total section of the fuel tank;
and finally, positioning and pier falling are carried out on the fuel tank total section according to the calculation result, so that the fuel tank total section and the half ship are positioned on the same straight line, and an embedding area with a certain straight line distance is kept between the fuel tank total section and the half ship.
Preferably, the length of the infill region between the half-ship and the tank block should be 20mm-30mm longer than the theoretical length.
Preferably, the complementary segments comprise a first complementary segment and a second complementary segment,
after the first embedding section is embedded in the embedding area between the half ship and the fuel tank main section, the second embedding section is embedded between the first embedding section and the fuel tank main section.
The invention has the beneficial effects that:
1. the method is simple to operate and convenient to implement, the total section of the fuel tank floats and then is positioned in place at one time, the position of the fuel tank does not need to be adjusted and positioned at the second time, the time of using the three-dimensional jacking trolley to perform the secondary adjustment operation in the traditional method is reduced, the carrying period of a dock is shortened, and the production cost of an enterprise is saved.
2. After the positioning of the stern half ship and the fuel tank main section is finished, other sections can be carried at the bow end of the fuel tank main section simultaneously while embedding and repairing sections between the stern half ship and the fuel tank main section, so that the working efficiency can be improved, and the dock carrying period can be shortened.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Figure 1 is a schematic view of a first reference line scribed at a first dock edge.
Fig. 2 is a schematic diagram of three marker points selected on a semi-ship.
Fig. 3 is a control diagram of the length of the infill region between the half-ship and the tank block.
Fig. 4 is a schematic view of the positioning of the fuel tank block according to the landing deviation angle a of the half ship.
Fig. 5 is a schematic illustration of the hull linetype deviation at the location of the marker points on the half-ship.
The reference numerals in the figures have the meaning:
the method comprises the following steps that 1 is a first dock, 2 is a first reference line, 3 is a central line of a half ship body located at the bottom of the first dock, 4 is a half ship, 5 is a fuel tank total section, 6 is an embedding area, 7 is a second dock, 8 is a second reference line, and 9 is a second dock central line.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a positioning method for water space-above butt joint of a half ship and a block, which specifically comprises the following steps:
and S1, determining the linear deviation Delta L of the hull structure at the position of the mark point on the half ship.
Specifically, the method comprises the following steps:
s11, marking a first reference line 2 parallel to the center line 3 of the half hull of the first dock on the side margin of the first dock 1;
s12, selecting a plurality of marking points on the half ship along the length direction of the half ship 4;
s13, establishing a coordinate system by taking the first reference line 2 as an X axis, and measuring and recording the distance from each mark point to the first reference line 2 by adopting a total station;
and S14, respectively calculating the linear deviation Delta L of the ship structure at the position of each mark point according to the measured distance value between each mark point and the first reference line 2.
Linear deviation delta L of hull structure at position of ith mark point on half ship 4i＝li-l1Wherein l isiIs the distance from the ith marking point to the first reference line, l1And the distance from the 1 st mark point to the first reference line is the distance, wherein the 1 st mark point is a mark point close to the end part of the half ship.
As shown in fig. 5, suppose that a marker point, designated as A, C, B, is selected from the front, middle and rear parts of the half ship, and the distance values from A, B, C three points to the first reference line are measured respectively. Theoretically, the distance values from the three points A, B, C to the first reference line should be equal, but since the hull plate has a certain line shape and the plate thicknesses at different positions are different, the actually measured distance values from the three points A, B, C to the first reference line are not necessarily completely the same, and therefore, the line shape deviation Δ L of the hull structure at the positions of the marker points needs to be calculated respectively.
If the marking point at the point A is taken as the 1 st marking point, the line type of the ship body at the marking point is taken as a line type reference, and the line type deviation, delta L, of the ship body structure at the positions of the 2 nd marking point (the marking point at the point B) and the 3 rd marking point (the marking point at the point C) are respectively calculated2＝l2-l1、ΔL3＝l3-l1. Linear deviation Delta L of hull structure at position of 1 st mark point1Is 0.
And S2, floating and landing the half ship 4 to the second dock 7, measuring the distance L between the mark point on the half ship 4 and the second reference line 8 on the side edge of the second dock, and calculating the landing deviation angle a of the half ship 4 according to the linear deviation delta L of the ship structure at the position of the mark point and the distance L between the mark point and the second reference line 8.
Specifically, firstly, correcting the distance value between a mark point on the half ship 4 and a second reference line 8 on the side edge of the second dock 7 according to the linear deviation delta L of the ship structure at the position of the mark point, wherein the second reference line 8 is parallel to the center line 9 of the second dock;
after the ship half 4 has been landed in the second dock 7, the landed ship half 4 should theoretically be parallel to the second reference line 8 on the side of the second dock, but the ship half 4 may be askew due to a number of factors. As shown in fig. 4, the stern of the ship half 4 is slightly turned towards the second dock 7, s after it has been landed in the second dock 71Theoretical position of pier to be dropped for half ship, s2The actual position of the half ship pier is that a certain included angle exists between the half ship 4 and the second reference line 8, and the distance values measured from A, B, C three points to the second reference line are l in sequence1'、l2'、l3' since the hull structure at each marking point has line type deviation, in order to calculate the angle of the half ship offset (the included angle between the half ship and the horizontal line), the distance value between the marking point and the second reference line needs to be corrected to ignore the influence of the line type deviation of the hull structure. The corrected distance values of A, B, C from the three markers to the second reference line on the second dock side are therefore respectively l1'、l2'-ΔL2、l3'-ΔL3。
Then, linear regression analysis is performed on the distance value between the corrected mark point and the second reference line 8 on the side of the second dock 7, and the landing deviation angle a of the semi-ship 4 after the semi-ship 4 is landed in the second dock 7 is obtained.
And S3, positioning and upsetting the fuel tank total section 5 according to the landing deviation angle a of the half ship 4, so that the fuel tank total section 5 and the half ship 4 are in the same straight line and the embedding area 6 with a certain straight line distance is kept between the two.
In order to ensure that the subsequent caulking sections can be smoothly inserted between the half ship 4 and the fuel tank total section 5, the length L of the caulking area between the half ship 4 and the fuel tank total section 5 should be 20mm to 30mm longer than the theoretical length (the gap of 20mm to 30mm is the girth welding shrinkage compensation gap).
Specifically, the concrete steps of positioning and pier falling for the fuel tank block 5 are as follows:
firstly, selecting a plurality of measuring points in the total section of the fuel compartment along the length direction of the total section of the fuel compartment;
then, calculating the distance value from each measuring point to a second reference line 8 according to the landing deviation angle a of the half ship 4 and the length of an embedding area between the half ship 4 and the fuel tank total section 5;
and finally, positioning and upsetting the fuel tank total section 5 according to the calculation result, so that the fuel tank total section 5 and the half ship 4 are positioned on the same straight line, and a built-in area with a certain straight line distance is kept between the fuel tank total section 5 and the half ship 4.
And S4, embedding the embedding sections in the embedding area between the half ship 4 and the fuel tank total section 5.
The embedding and repairing section comprises a first embedding and repairing section and a second embedding and repairing section, wherein the first embedding and repairing section is composed of two double-layer bottom ring sections, and the second embedding and repairing section is composed of three double-layer bottom ring sections.
After the first embedment section is embedded in the embedment region between the half ship 4 and the fuel tank total section 5, the second embedment section is embedded between the first embedment section and the fuel tank total section 5. In fig. 3, the first complementary section is fitted between L1, and the second complementary section is fitted between L2.
In order to ensure that the embedding sections can be smoothly embedded between the stern half ship 4 and the fuel tank total section 5, the length of an embedding area between the fuel tank total section 5 and the stern half ship 4 is ensured when the fuel tank total section 5 is positioned, the lengths of a first embedding section and a second embedding section to be embedded are controlled when the fuel tank total section is assembled, and the precision error is controlled within 0-5 mm so as to avoid the difficulty in embedding the sections due to positive tolerance.
When the embedded sections are embedded, other sections (sections to be carried to the bow end part of the general section of the fuel tank) can be carried at the bow end part of the general section 5 of the fuel tank at the same time, so that the working efficiency can be improved, and the dock carrying period can be shortened.
Through tests, when the half ship and the total section are butted by adopting a traditional method, after the positioning of the half ship is finished, the working time of 1.5 days is needed for the positioning of the embedding section, the cost of a dock is 20 ten thousand per day, the working time of 0.5 days is needed for the positioning of the total section by adopting the secondary movement of the three-dimensional jacking trolley, the related construction cost is about 10 ten thousand yuan, and the carrying of the section to be carried to the bow end part of the total section of the fuel tank can be carried out only after the whole positioning of the embedding section and the total section of the fuel tank by adopting the traditional construction method. The method of the invention can save two days of dock cycle in total and can save about 50 ten thousand yuan of production cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A positioning method for half ship and block water space butt joint is characterized by comprising the following steps:
s1, determining the linear deviation delta L of the hull structure at the position of the mark point on the half ship;
s2, floating and falling the pier to the second dock by the half ship, measuring the distance L between the mark point on the half ship and the second reference line on the side of the second dock, and calculating the falling position deviation angle a of the half ship according to the linear deviation delta L of the ship structure at the position of the mark point and the distance L between the mark point and the second reference line;
s3, positioning and heading the fuel tank total section according to the landing deviation angle a of the half ship, so that the fuel tank total section and the half ship are positioned on the same straight line and an embedding area with a certain straight line distance is kept between the fuel tank total section and the half ship;
and S4, embedding the embedding sections in the embedding area between the half ship and the fuel tank total section.
2. The method for positioning the half ship and the block water gap butt joint according to claim 1, wherein the specific step of determining the linear deviation Δ L of the hull structure at the position of the mark point on the half ship in step S1 is as follows:
s11, marking a first reference line parallel to the center line of the half ship body of the first dock on the side margin of the first dock;
s12, selecting a plurality of mark points on the half ship along the length direction of the half ship;
s13, establishing a coordinate system by taking the first reference line as an X axis, and measuring and recording the distance from each mark point to the first reference line by using a total station;
and S14, respectively calculating the linear deviation Delta L of the ship structure at the position of each mark point according to the measured distance value between each mark point and the first reference line.
3. The method for positioning the overwater spaced butt joint of the half ship and the block section according to claim 2, wherein the linear deviation △ L of the ship structure at the position of the ith mark point on the half shipi＝li-l1Wherein l isiIs the distance from the ith marking point to the first reference line, l1And the distance from the 1 st mark point to the first reference line is the distance, wherein the 1 st mark point is a mark point close to the end part of the half ship.
4. The method for positioning the half ship in the water-gap butt joint with the block section according to claim 1, wherein the step of calculating the landing deviation angle a of the half ship in the step S2 comprises the steps of:
s21, correcting the distance value between the mark point on the half ship and a second reference line on the side edge of a second dock according to the linear deviation delta L of the ship structure at the position of the mark point;
and S22, performing linear regression analysis on the distance value between the corrected mark point and a second reference line on the side edge of the second dock to obtain the landing deviation angle a of the semi-ship from the semi-ship landing pier to the semi-ship in the second dock.
5. The method of positioning half-boats and block water spaced docks according to claim 4, wherein the second reference line is parallel to a dock centerline of the second dock.
6. The method for positioning the water-air-separation butt joint of the half ship and the block according to claim 1, wherein the step S3 of positioning and landing the block of the fuel tank according to the landing deviation angle a of the half ship comprises the following specific steps:
firstly, selecting a plurality of measuring points in the total section of the fuel compartment along the length direction of the total section of the fuel compartment;
then, calculating the distance value from each measuring point to a second reference line according to the landing deviation angle a of the half ship and the length of an embedding area between the half ship and the total section of the fuel tank;
and finally, positioning and pier falling are carried out on the fuel tank total section according to the calculation result, so that the fuel tank total section and the half ship are positioned on the same straight line, and an embedding area with a certain straight line distance is kept between the fuel tank total section and the half ship.
7. The method for positioning the half ship and the total section water gap butt joint according to claim 6, wherein the length of a caulking area between the half ship and the total section of the fuel tank is 20-30 mm longer than the theoretical length.
8. The method for positioning the half-ship in spaced-apart water-to-total-section butt joint according to claim 1, wherein the embedded sections comprise a first embedded section and a second embedded section,
after the first embedding section is embedded in the embedding area between the half ship and the fuel tank main section, the second embedding section is embedded between the first embedding section and the fuel tank main section.
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| CN202010412326.0A CN111776163B (en) | 2020-05-15 | 2020-05-15 | Positioning method for half ship and block water gap butt joint |
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| CN202010412326.0A CN111776163B (en) | 2020-05-15 | 2020-05-15 | Positioning method for half ship and block water gap butt joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114670986A (en) * | 2022-04-01 | 2022-06-28 | 江南造船(集团)有限责任公司 | Ship block floating state docking method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101670882A (en) * | 2009-09-02 | 2010-03-17 | 惠生（南通）重工有限公司 | Method for positioning water floating fall pier of super-huge type segmental dock |
| CN102328729A (en) * | 2011-05-31 | 2012-01-25 | 江苏熔盛造船有限公司 | Process of afloat ship twin-islet jointing |
| CN102745308A (en) * | 2012-06-21 | 2012-10-24 | 上海江南长兴重工有限责任公司 | Method for carrying bulk freighter body stern part assembly |
| CN108202846A (en) * | 2016-12-16 | 2018-06-26 | 沪东中华造船(集团)有限公司 | A kind of secondary localization method to lie up of ship |
| KR20180076967A (en) * | 2016-12-28 | 2018-07-06 | 대우조선해양 주식회사 | Device and method for automatic installation of keel block using GPS signal |
| CN108773457A (en) * | 2018-05-31 | 2018-11-09 | 广船国际有限公司 | A kind of large-sized annular block closes up localization method |
| CN109579803A (en) * | 2018-10-29 | 2019-04-05 | 广州黄船海洋工程有限公司 | A kind of Ship docking positioning and monitoring method |
| CN110027674A (en) * | 2019-05-16 | 2019-07-19 | 上海外高桥造船有限公司 | General section of shipbody shifts construction method |
| CN110758672A (en) * | 2018-07-26 | 2020-02-07 | 江苏扬子鑫福造船有限公司 | Method for quickly and integrally shifting and falling two large semi-floating ships |
-
2020
- 2020-05-15 CN CN202010412326.0A patent/CN111776163B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101670882A (en) * | 2009-09-02 | 2010-03-17 | 惠生（南通）重工有限公司 | Method for positioning water floating fall pier of super-huge type segmental dock |
| CN102328729A (en) * | 2011-05-31 | 2012-01-25 | 江苏熔盛造船有限公司 | Process of afloat ship twin-islet jointing |
| CN102745308A (en) * | 2012-06-21 | 2012-10-24 | 上海江南长兴重工有限责任公司 | Method for carrying bulk freighter body stern part assembly |
| CN108202846A (en) * | 2016-12-16 | 2018-06-26 | 沪东中华造船(集团)有限公司 | A kind of secondary localization method to lie up of ship |
| KR20180076967A (en) * | 2016-12-28 | 2018-07-06 | 대우조선해양 주식회사 | Device and method for automatic installation of keel block using GPS signal |
| CN108773457A (en) * | 2018-05-31 | 2018-11-09 | 广船国际有限公司 | A kind of large-sized annular block closes up localization method |
| CN110758672A (en) * | 2018-07-26 | 2020-02-07 | 江苏扬子鑫福造船有限公司 | Method for quickly and integrally shifting and falling two large semi-floating ships |
| CN109579803A (en) * | 2018-10-29 | 2019-04-05 | 广州黄船海洋工程有限公司 | A kind of Ship docking positioning and monitoring method |
| CN110027674A (en) * | 2019-05-16 | 2019-07-19 | 上海外高桥造船有限公司 | General section of shipbody shifts construction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114670986A (en) * | 2022-04-01 | 2022-06-28 | 江南造船(集团)有限责任公司 | Ship block floating state docking method |
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